def add (a, b):
    print (f"ADDING {a} + {b}")
    return a + b

def substract(a, b):
    print (f"SUBTACTING {a} - {b}")
    return a - b

def multiply (a, b):
    print (f"MULTIPLYING {a} * {b}")
    return a * b

def divide (a, b):
    print(f"DIVIDING {a} / {b}")
    return a / b


print ("Let's do some math with just funchtions!")

age = add (30, 5)
height = substract (78, 4)
weight = multiply(90, 2)
iq = divide(100, 2)

print (f"Age: {age}, Height: {height}, Weight: {weight}, Iq: {iq}")

# A puzzle for the extra credit, type it in anyway.
print ("Here is a puzzle.")

what = add(age, substract(height, multiply(weight, divide(iq, 2))))

print ("That becomes:", what, "Can you do it by hand?")
